Northrop Gurmman Corporation Electro-Optical Systems 影像增幅管分类

以下为Northrop Gurmman Corporation EOS于2008年併入L-3前所公佈的夜视镜影像增幅管的等级，此为旧资料但市面上仍有以此为分类的影像增幅管流通，主要为Infinity系列和Alpha系列，Defender当时尚未公佈但推测为OMNI VII等级。

D - Defender Series (2007)

Resolution:            Unrestricted
Signal/Noise:         Unrestricted

FOM:                      Unrestricted

∞ -Infinity Series

Resolution:            64 lp/mm (min)
Signal/Noise:         25.0 : 1

FOM:                                     Unrestricted

Ω -  Omega Series

Resolution:           64 lp/mm (min)
Signal/Noise:        21.0 : 1

FOM:                                    Unrestricted

Δ - Delta Series

Resolution:           64 lp/mm (min)
Signal/Noise:        21.0 : 1

FOM:                                   1600

Γ - Gamma Series

Resolution:           57 lp/mm (min)
Signal/Noise:        19.2 : 1

FOM:                                   1600

Α - Alpha Series

Resolution:           45 lp/mm (min)
Signal/Noise:        17.1 : 1

FOM:                                   1250